The Ruby, Opal and Pearl models were part of a revised range of Austin Sevens introduced in August 1934 and known as Austin's cheap jewellery.
Radical features included more streamlining, new chassis and a synchronised second gear. For 1937 the engine gained three main bearings.
The original Seven had sold nearly 200,000 by the 1934 face lift and a further 100,000 were sold when the last was built in Spring 1939.
In these last years, most were Ruby saloons although the Big Seven was introduced in an attempt to update the basic Seven concept but it was unsuccessful and was replaced by the all-new Eight.